Special Vent Installations; Periscope Termination; Corner Termination - Napoleon Arlington GDS20N Installation And Operating Instructions Manual

3.3

SPECIAL VENT INSTALLATIONS

3.3.1 PERISCOPE TERMINATION

Use the periscope kit to locate the air termination above grade. The periscope must
be installed so that when fi nal grading is completed, the bottom air slot is located a
minimum of 12" above grade. The maximum allowable vent length is 10'.

3.3.2 CORNER TERMINATION

The maximum vent length for a corner installation is 24" of horizontal run, in addition to the 45° offset. In this
case zero rise is acceptable. See illustrations below. It is recommended to maintain a 6" rise.
24" MINIMUM
REGARDLESS
OF HORIZONTAL
VENT LENGTH
25 3/8"
20" MAXIMUM
24" MAXIMUM
11
12" MIN
TO GRADE
9.5
W415-0496 / D / 11.05.10